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A universal postprocessing toolkit for accelerator simulation and data analysis.
The Self-Describing Data Sets (SDDS) toolkit comprises about 70 generally-applicable programs sharing a common data protocol. At the Advanced Photon Source (APS), SDDS performs the vast majority of operational data collection and processing, most data display functions, and many control functions. In addition, a number of accelerator simulation codes use SDDS for all post-processing and data display. This has three principle advantages: first, simulation codes need not provide customized post-processing tools, thus simplifying development and maintenance. Second, users can enhance code capabilities without changing the code itself, by adding SDDS-based pre- and post-processing. Third, multiple codes can be used together more easily, by employing SDDS for data transfer and adaptation. Given its broad applicability, the SDDS file protocol is surprisingly simple, making it quite easy for simulations to generate SDDS-compliant data. This paper discusses the philosophy behind SDDS, contrasting it with some recent trends, and outlines the capabilities of the toolkit. The paper also gives examples of using SDDS for accelerator simulation.
Date:
December 16, 1998
Creator:
Borland, M.
Object Type:
Article
System:
The UNT Digital Library
Study of the high-j states in {sup 249}Cm.
The authors have performed the reaction {sup 248}Cm({sup 4}He, {sup 3}He) using 98.5-MeV alpha particles from the IUCF cyclotron to populate high-j states in {sup 249}Cm. A tentative assignment of the K{sub 17/2} component of the 1/2{sup +}[880] Nilsson state has been made.
Date:
July 16, 1998
Creator:
Ahmad, I.
Object Type:
Article
System:
The UNT Digital Library
RF power generation and coupling measurements for the dielectric wakefield step-up transformer.
The dielectric wakefield transformer (DWT) is one route to practical high energy wakefield-based accelerators. Progress has been made in a number of areas relevant to the demonstration of this device. In this article we describe recent bench measurements and beam experiments using 7.8 and 15.6 GHz structures and discuss some remaining technical challenges in the development of the DWT.
Date:
June 16, 1998
Creator:
Conde, M. E.
Object Type:
Article
System:
The UNT Digital Library
A neutronic feasibility study for LEU conversion of the high flux beam reactor (HFBR).
A neutronic feasibility study for converting the High Flux Beam Reactor at Brookhaven National Laboratory from HEU to LEU fuel was performed at Argonne National Laboratory. The purpose of this study is to determine what LEU fuel density would be needed to provide fuel lifetime and neutron flux performance similar to the current HEU fuel. The results indicate that it is not possible to convert the HFBR to LEU fuel with the current reactor core configuration. To use LEU fuel, either the core needs to be reconfigured to increase the neutron thermalization or a new LEU reactor design needs to be considered. This paper presents results of reactor calculations for a reference 28-assembly HEU-fuel core configuration and for an alternative 18-assembly LEU-fuel core configuration with increased neutron thermalization. Neutronic studies show that similar in-core and ex-core neutron fluxes, and fuel cycle length can be achieved using high-density LEU fuel with about 6.1 gU/cm{sup 3} in an altered reactor core configuration. However, hydraulic and safety analyses of the altered HFBR core configuration needs to be performed in order to establish the feasibility of this concept.
Date:
January 16, 1998
Creator:
Pond, R. B.
Object Type:
Article
System:
The UNT Digital Library
JANUS reactor d and d project.
Argonne National Laboratory (ANL-E) has recently completed the decontamination and decommissioning (D and D) of the JANUS Reactor Facility located in Building 202. The 200 KW reactor operated from August 1963 to March 1992. The facility was used to study the effects of both high and low doses of fission neutrons in animals. There were two exposure rooms on opposite sides of the reactor and the reactor was therefore named after the two-faced Roman god. The High Dose Room was capable of specimen exposure at a dose rate of 3,600 rads per hour. During calendar year 1996 a detailed characterization of the facility was performed by ANL-E Health Physics personnel. ANL-E Analytical Services performed the required sample analysis. An Auditable Safety Analysis and an Environmental Assessment were completed. D and D plans, procedures and procurement documents were prepared and approved. A D and D subcontractor was selected and a firm, fixed price contract awarded for the field work and final survey effort. The D and D subcontractor was mobilized to ANL-E in January 1997. Electrical isolation of all reactor equipment and control panels was accomplished and the equipment removed. A total of 207,230 pounds (94,082 Kg) of lead shielding was …
Date:
February 16, 1998
Creator:
Fellhauer, C. R.
Object Type:
Article
System:
The UNT Digital Library
Examination plan for the soils and low-level radioactive waste forms of the NRC field testing lysimeters.
The Field Lysimeter Investigations: Low-level Waste Data Base Development Program is obtaining information on the performance of radioactive waste forms. These experiments were recently shut down and have been examined in accordance with a detailed waste form and soil sampling plan. Ion-exchange resins from a commercial nuclear power station were solidified into waste forms using portland cement and vinyl ester-styrene. These waste forms were tested to (a) obtain information on performance of waste forms in typical disposal environments, (b) compare field results with bench leach studies, (c) develop a low-level waste data base for use in performance assessment source term calculations, and (d) apply the DUST computer code to compare predicted cumulative release to actual field data. The program, funded by the Nuclear Regulatory Commission (NRC), includes observed radionuclide releases from waste forms at two test sites over 10 years of successful operation. The lysimeter is a useful experimental device that is providing source term data and can be used to determine waste form stability. Lysimeters are ideal systems for obtaining actual field test data because, when properly designed and operated, they can be used to isolate soil and waste systems under actual environmental conditions. Such conditions cannot be duplicated …
Date:
January 16, 1998
Creator:
McConnell, J.W. Jr.
Object Type:
Article
System:
The UNT Digital Library
Modeling characterization of the National Ignition Facility focal spot
None
Date:
January 16, 1998
Creator:
Williams, W. H.; Auerbach, J. M.; Henesian, M. A.; Lawson, J. K.; Hunt, J. T.; Sacks, R. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Status of RNB facilities in North America.
This paper presents the status of accelerator facilities in North America that are involved in research using radioactive nuclear beams (RNB), including existing and operating facilities, ones currently under construction or undergoing major upgrades, and ones being planned or proposed for the future. Existing RNB facilities are located at TRIUMF (TISOL) in Vancouver, B.C., the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory, the Argonne Tandem Linear Accelerator System (ATLAS) at Argonne National Laboratory, the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University, the Nuclear Structure Laboratory at The University of Notre Dame, the 88 Cyclotron at Lawrence Berkeley National Laboratory, and the Cyclotron Institute at Texas A and M University. Currently, there are two major RNB facility upgrades in progress in North America, one at TRIUMF, the ISAC project, and one at NSCL the Intensity Upgrade project. For the future the U. S. Nuclear Science Advisory Committee has given high priority for an advanced RNB facility of the ISOL type. Concepts for such a facility, currently being developed at Argonne National Laboratory and Oak Ridge National Laboratory, are presented. Plans are also being developed in Canada at TRIUMF for a major upgrade of the ISAC …
Date:
September 16, 1998
Creator:
Nolen, J.
Object Type:
Article
System:
The UNT Digital Library
A {radical}S = 1 TeV ep collider at Fermilab.
One of the major projects being considered for future construction at Fermilab is a Very Large Hadron Collider (VLHC). This project will require a new High Energy Booster ring, 33 km in circumference, to provide 3 TeV proton beams for injection into the VLHC. Here we discuss the possibility to build an ep collider in the VLHC Booster tunnel. A LEP-like e{sup {+-}} beam (83 GeV) would collide with one of the proton beams (3 TeV) to create a {radical}s {approx} 1 TeV ep collider. Design groups at Argonne and Fermilab have established that it is feasible to build electron injection at the existing infrastructure, and provide a machine with luminosity exceeding 10{sup 32} cm{sup {minus}2} s{sup {minus}1}.
Date:
November 16, 1998
Creator:
Krakauer, D.
Object Type:
Article
System:
The UNT Digital Library
Irradiation, Annealing, and Reirradiation Effects on American and Russian Reactor Pressure Vessel Steels
One of the options to mitigate the effects of irradiation on reactor pressure vessels (RPVs) is to thermally anneal them to restore the toughness properties that have been degraded by neutron irradiation. Even though a postirradiation anneal may be deemed successful, a critical aspect of continued RPV operation is the rate of embrittlement upon reirradiation. There are insufficient data available to allow for verification of available models of reirradiation embrittlement or for the development of a reliable predictive methodology. This is especially true in the case of fracture toughness data. Under the U.S.-Russia Joint Coordinating Committee for Civilian Nuclear Reactor Safety (JCCCNRS), Working Group 3 on Radiation Embrittlement, Structural Integrity, and Life Extension of Reactor Vessels and Supports agreed to conduct a comparative study of annealing and reirradiation effects on RPV steels. The Working Group agreed that each side would irradiate, anneal, reirradiate (if feasible ), and test two materials of the other. Charpy V-notch (CVN) and tensile specimens were included. Oak Ridge National Laboratory (ORNL) conducted such a program (irradiation and annealing, including static fracture toughness) with two weld metals representative of VVER-440 and VVER-1000 RPVs, while the Russian Research Center-Kurchatov Institute (RRC-KI) conducted a program (irradiation, annealing, reirradiation, …
Date:
June 16, 1998
Creator:
Chernobaeva, A.A.; Korolev, Y.N.; Nanstad, R.K.; Nikolaev, Y.A. & Sokolov, M.A.
Object Type:
Article
System:
The UNT Digital Library
Bremsstrahlung pair-production of positrons with low neutron background.
Minimization of component activation is highly desirable at accelerator-based positron sources. Electrons in the 8- to 14-MeV energy range impinging on a target produce photons energetic enough to create electron-positron pairs; however, few of the photons are energetic enough to produce photoneutrons. Slow positron production by low-energy electrons impinging on a multilayer tungsten target with and without electromagnetic extraction between the layers was studied by simulation. The neutron background from 14-MeV electrons is expected to be significantly lower than that encountered with higher-energy electron beams. Numerical results are presented and some ideas for a low-activation slow-positron source are discussed.
Date:
September 16, 1998
Creator:
Lessner, E.
Object Type:
Article
System:
The UNT Digital Library
Microstructure and leaching characteristics of a technetium containing metal waste form.
Argonne National Laboratory is developing an electrometallurgical treatment for spent fuel from the experimental breeder reactor II. A product of this treatment process is a metal waste form that incorporates the stainless steel cladding hulls, zirconium from the fuel and the fission products that are noble to the process, i.e., Tc, Ru, Pd, Rh, Ag. The nominal composition of this waste form is stainless steel/15 wt% zirconium 1-4 wt% noble metal fission products. The behavior of technetium is of particular importance from a disposal point of view for this waste form due to its long half life, 2. 14E5 years, and its mobility in groundwater. To address these concerns a limited number of spiked metal waste forms were produced containing Tc. These surrogate waste forms were then studied using scanning electron microscopy and selected leaching tests.
Date:
December 16, 1998
Creator:
Johnson, S. G.
Object Type:
Article
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 82, No. 133, Ed. 1 Monday, March 16, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 16, 1998
Creator:
Ratcliffe, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 82, No. 157, Ed. 1 Thursday, April 16, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 16, 1998
Creator:
Ratcliffe, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Levelland and Hockley County News-Press (Levelland, Tex.), Vol. 20, No. 40, Ed. 1 Sunday, August 16, 1998
Semiweekly newspaper from Levelland, Texas that includes local, state, and national news along with advertising.
Date:
August 16, 1998
Creator:
Rigg, John
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 40, Ed. 1 Wednesday, December 16, 1998
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 16, 1998
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 76, No. 143, Ed. 1 Thursday, April 16, 1998
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
April 16, 1998
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 76, No. 92, Ed. 1 Monday, February 16, 1998
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 16, 1998
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 76, No. 247, Ed. 1 Sunday, August 16, 1998
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
August 16, 1998
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
Stamford American (Stamford, Tex.), Vol. 77, No. 4, Ed. 1 Thursday, April 16, 1998
Weekly newspaper from Stamford, Texas that includes local, state, and national news along with advertising.
Date:
April 16, 1998
Creator:
Dalliston, Linda
Object Type:
Newspaper
System:
The Portal to Texas History
Stamford American (Stamford, Tex.), Vol. 77, No. 17, Ed. 1 Thursday, July 16, 1998
Weekly newspaper from Stamford, Texas that includes local, state, and national news along with advertising.
Date:
July 16, 1998
Creator:
Dalliston, Linda
Object Type:
Newspaper
System:
The Portal to Texas History
The Bastrop Advertiser (Bastrop, Tex.), Vol. 145, No. 13, Ed. 1 Thursday, April 16, 1998
Semi-weekly newspaper from Bastrop, Texas that includes local, state, and national news along with advertising.
Date:
April 16, 1998
Creator:
McAuley, Davis
Object Type:
Newspaper
System:
The Portal to Texas History
The Bastrop Advertiser (Bastrop, Tex.), Vol. 145, No. 40, Ed. 1 Thursday, July 16, 1998
Semi-weekly newspaper from Bastrop, Texas that includes local, state, and national news along with advertising.
Date:
July 16, 1998
Creator:
McAuley, Davis
Object Type:
Newspaper
System:
The Portal to Texas History
The Bastrop Advertiser (Bastrop, Tex.), Vol. 145, No. 22, Ed. 1 Saturday, May 16, 1998
Semi-weekly newspaper from Bastrop, Texas that includes local, state, and national news along with advertising.
Date:
May 16, 1998
Creator:
McAuley, Davis
Object Type:
Newspaper
System:
The Portal to Texas History